The failed coup attempts in 1931 (the March Incident and the Imperial Colors Incident) by the Sakurakai, a secret society within the junior ranks of the Imperial Japanese Army officer corps promoting a vision of a militaristic totalitarian system as an alternative to the perceived corrupt party politics dominated democratic government, inspired similar plans by other groups within the military.
Forewarned, Captain Tsuji Masanobu, company commander at the Army Academy, arranged the arrest of the principals by the Kempeitai on 20 November 1934, ending the possible coup d'état before it could even get started.
For lack of evidence, the accused could not be convicted; but the five cadets were expelled from the academy in March 1935, and the two officers, Muranaka and Isobe were suspended for six months from duty in April 1935.
When the suspended officers Muranaka and Isobe later distributed pamphlets entitled "Remonstrance for the Restoration of Military Discipline" (otherwise known as "Views on the Housecleaning of the Army"), they were dismissed from the service outright in August 1935.
Nagata was posthumously promoted to lieutenant general, and Aizawa was executed by firing squad after a court martial held by the IJA 1st Division based in Tokyo.